Trolley-wire clamp



G. H. BOLUS.

TROLLEY WIRE CLAMP.

APPLICATION FILED SEPT. 7. 1911.

1,364,026. 7 Patented Dec. 28, 1920.

UNITED STATES PATENT OFFICE.

GLENN HENRY BOLUS, OF MANSFIELD, OHIO, ASSIGNOB TO THE OHIO BRASSOOM- PANY, OF MANSFIELD, OHIO, A CORIPORATION OF NEW JERSEY.

TROLLEY-WIRE CLAMP.

Application filed September 7, 1917. Serial No. 190,149.

T all whom it may concern Be it known that I, GLENN H. Bonus, a citizen of the United States, residing at Mansfield, in the county of Richland and State of Ohio, have invented certain new and useful Improvements in Trolleyire Clamps, of which the following is a specification.

This invention relates to improvements in trolley wire clamps, and one of the principal objects of the invention is to provide an improved construction, combination and management of the several parts which will be simple in construction and effective and efficient in operation.

Another object of my invention is to provide an improved device of this character having positive action and adapted to be readily inserted into and removed from operative position.

.1 further object is to provide an improved trolley clamp having means for detachably and adjustably connecting the clamp to its support on hanger and having swivel jaws whereby a perfect alinement of the trolley wire may be obtained when the parts are secured together.

With these and other objects in view, which will be apparent in the specification, my invention consists in the features of novelty in the construction, combination and arrangement of the parts hereinafter more fully described and claimed, and shown in the accompanying drawings illustrating the embodiment of my invention in which Figure 1 is a longitudinal vertical section of a trolley clamp embodying the principles of my invention.

Fig. 2, is a transverse sectional view of the device, showing the several parts in the positions they assume when gripped upon the trolley wire.

Fig. 3, is an end view of the clamp, removed from the hanger or support and showing the jaws in open position.

Fig. 4, is a sectional view taken on the line 1-4 Fig. 2.

Referring to the drawings in which similar reference characters indicate like parts in the different views, (1) generally indicates an insulated hanger or support having suitable means (2) whereby it is rigidly secured or suspended in the usual manner. Embedded within the insulation materlal Specification of Letters Patent.

(3), is a stud (4) having its lower end (5) provided with screw threads to receive the threaded socket (6). The threaded socket (6), comprises a cylindrical body (7), having a hexagonal flange (8), which is slidably received within the hexagonal opening (9) provided in one end of the adjusting sleeve (10), the opposite end of the said sleeve being provided with a wedging sur face (11) and an opening (12), adapted to loosely receive the body (7) of the socket.

The exterior surface of the adjusting sleeve (10) is preferably of hexagon shape and which when rotated causes the threaded socket (6) to screw on the threaded end (5) of the stud (a) by means of engagement with the hexagonal flange (8) as shown in Fig. 4. A connecting pin (13) projects through a suitable aperture formed in the end of the socket (6) wherein it is loosely mounted and supported by means of the head (14) engaging the end surface of the said socket. The connecting pin (13) has an aperture (15) formed adjacent the end thereof adapted to receive the pin (16).

The clamping member comprises a pair of interchangeable clamping jaws (17) each provided with apertured lugs, (18) the lower ends of the jaws being preferably constructed as shown for the purpose of gripping the trolley wire (19) when in clamped position. Each of the jaws (17 comprises a power arm flared outwardly to provide a conical wedging surface (21) the purpose of which will be described hereinafter.

It will be noted in Fig. 1, that the connecting pin (13) is positioned between the central lugs (18) of the clamping members (17) thereby retaining the conical wedging surfaces (21) of the clamping members in line with the wedging surface (11) of the adjusting collar (10). Inasmuch as the adjusting collar (10) and the threaded socket (6) are locked against relative rotative movement by means of hexagonal opening (9) and the flange (8), positioned therein, a rotation of the collar, in one direction, will cause the socket (6) to screw on the end (5) of the stud (4). This movement will adjust the socket (6) upon the stud (4) to draw the 'aws (17) upwardly and also the collar (10) since it 1s free to slide on the socket and rests upon the jaws (17).

Continued rotation of the parts (6) and (10) will cause the upper face of the collar (10) to finally engage the face A of the hanger thereby arresting the upward movement of the collar (10) but not of the socket (6) which will continue to move upward drawing with it the jaws (17). As the rotation of the parts (6) and (10) is continued the power arms (20) of the jaws (17) will be forced apart, through engagement with the surface (11) about the fulcrum pin (16) thereby causing the clamping jaws (17 to grip. the wire. Rotative 'movement of the collar (10) inthe opposite di rection releases the grip of the jaws from the wire.

Having thus fully described my inven tion, and shown one form. embodying the same, I do not wish to' belimited to the details of the construction shown, since these can be obviously changed withoutdeparting from the spirit and scope of the invention,

what I claim, and desire tosecure by Letters Patent is 2- 1. A trolley clamp for attachment to a hanger comprising a pair of clamping jaws, means securing the jaws together but permitting a relative movement of the j aws, a stem secured between the jaws, a supporting socket mounted on the stem and having a rotatable and a sliding longitudinal movement relative to the stem but such move- 'ments being independent of each other, .means limiting the longitudmal movement stem and having independent rotatable and longitudinal movement therewith, means limiting the longitudinal movement, means I on the supporting socket to secure the clamp gether, a supporting socket rotatably mount- 7 ed between the jaws, means on the socket for securing the clamp to the. hanger, astem mounted in the socket and secured to the pin against rotation, means on the socket and pin permitting relative rotation and longi tudinal movement and a collar mounted on the socket and moving longitudinal thereof but interlocked against relative rotation. therewith and engaging the jawsand hanger to secure the clamp to the trolley wire when the collar and supporting socket are rotating.

4. A trolley wire clamp for attachment to a hanger comprising a pair of clamping jaws, a pin pivotally securing the jaws together, a supporting socket rotatably mounted between the. jaws, means on the socket to engage the hanger and secure the clamp to the hanger, a stem mounted in the socket and secured to the pin, a shoulder on the stem co-acting with a shoulder in the socket permitting a limited longitudinal movement of the socket relatively to the stem and a collar mounted on the socket to move longitudinally thereof and engaging the hanger and jaws to actuate the jaws to grip the trolley wire. l

In testimony whereof I aiiix my signature,

GLENN HENRY BOLUS. 

